The 1983–84 Cupa României was the 46th edition of Romania's most prestigious football cup competition.
The title was won by Dinamo București against Steaua București.
The competition is an annual knockout tournament.
First round proper matches are played on the ground of the lowest ranked team, then from the second round proper the matches are played on a neutral location.
If a match is drawn after 90 minutes, the game goes in extra time, if the scored is still tight after 120 minutes, then the winner will be established at penalty kicks.
From the first edition, the teams from Divizia A entered in competition in sixteen finals, rule which remained till today.
| Team 1 | Score | Team 2 |
|---|---|---|
| 7 December 1983 | ||
| UTA Arad (Div. B) | 1–0 | (Div. A) Politehnica Iași |
| Minerul Baraolt (Div. C) | 0–3 | (Div. A) Dunărea CSU Galați |
| Metalul Bocşa (Div. C) | 0–1 | (Div. A) ASA 1962 Târgu Mureș |
| Dinamo Victoria București (Div. B) | 1–2 | (Div. A) SC Bacău |
| Sportul Muncitoresc Caracal (Div. C) | 0–1 | (Div. A) Corvinul Hunedoara |
| Poiana Câmpina (Div. C) | 0–2 | (Div. A) Chimia Râmnicu Vâlcea |
| Viitorul Gheorgheni (Div. C) | 3–1 | (Div. A) FC Baia Mare |
| Mureşul Luduş (Div. C) | 0–0 (a.e.t.)(1-3 p) | (Div. A) Sportul Studenţesc București |
| Cimentul Medgidia (Div. C) | 0–4 | (Div. A) Steaua București |
| Metalul Rădăuţi (Div. C) | 1–3 | (Div. A) Argeş Piteşti |
| Precizia Săcele (Div. C) | 0–1 | (Div. A) Rapid București |
| Victoria Tecuci (Div. C) | 0–1 | (Div. A) Petrolul Ploiești |
| CS Târgovişte (Div. A) | 1–3 | (Div. A) Olt Scornicești |
| Armătura Zalău (Div. B) | 0–1 | (Div. A) Jiul Petroşani |
| 12 February 1984 | ||
| Petrolul Moineşti (Div. C) | 1–4 | (Div. A) Dinamo București |
| 23 February 1984 | ||
| Universitatea Craiova (Div. A) | 2–1 | (Div. A) Bihor Oradea |
| Team 1 | Score | Team 2 |
|---|---|---|
| 3 March 1984 | ||
| Petrolul Ploiești | 1–0 | Dunărea CSU Galați |
| Argeş Piteşti | 2–1 | UTA Arad |
| Steaua București | 1–0 (a.e.t.) | SC Bacău |
| Jiul Petroşani | 1–2 (a.e.t.) | Corvinul Hunedoara |
| Viitorul Gheorgheni | 0–2 | ASA 1962 Târgu Mureș |
| Sportul Studenţesc București | 2–2 (a.e.t.)(5-4 p) | Chimia Râmnicu Vâlcea |
| Olt Scornicești | 0–2 | Dinamo București |
| Rapid București | 2–1 | Universitatea Craiova |
| Team 1 | Score | Team 2 |
|---|---|---|
| 20 March 1984 | ||
| Corvinul Hunedoara | 3–1 (a.e.t.) | Rapid București |
| Steaua București | 2–0 | Argeş Piteşti |
| Sportul Studenţesc București | 3–1 | ASA 1962 Târgu Mureș |
| 18 April 1984 | ||
| Dinamo București | 4–2 | Petrolul Ploiești |
| Team 1 | Score | Team 2 |
|---|---|---|
| 11 May 1984 | ||
| Sportul Studenţesc București | 0–2 | Steaua București |
| Dinamo București | 2–0 | Corvinul Hunedoara |
| Dinamo București | 2–1 | Steaua București |
|---|---|---|
Custov  45'Orac 53' |
Report | Lăcătuș 10' |
| Cupa României 1983–84 winners |
|---|
| Dinamo București 5th title |
